Class: QgsAspectFilter

class qgis.analysis.QgsAspectFilter

Bases: QgsDerivativeFilter

Calculates aspect values in a window of 3x3 cells based on first order derivatives in x- and y- directions.

Direction is clockwise starting from north.

Methods

calcFirstDerX	Calculates the first order derivative in x-direction according to Horn (1981)
calcFirstDerY	Calculates the first order derivative in y-direction according to Horn (1981)
processNineCellWindow

calcFirstDerX(self)

Calculates the first order derivative in x-direction according to Horn (1981)

calcFirstDerY(self)

Calculates the first order derivative in y-direction according to Horn (1981)

processNineCellWindow(self)